Data. I have several terabytes of it, all sorts of stuff, video, audio, clean and unclean. Can't bear to delete anything unless it's redundant, and sometimes not even then. Western Digital is getting plenty of money from me.

I keep my gemstones in pouches or bowls (scallop shells make excellent displays). There's no such thing as too much aventurine.

What else? Candles - jars, cups, tapers and tealights, in a gazillion colours and scents. Notebooks - I journal a lot, but I tend to buy them considerably faster than I can fill them. Mugs and cups, and all the varieties of tea and herbal infusions to make in them.

I also have more WoD game resources than I could ever put to use in a lifetime, but doesn't everybody?

I collect crystals too. I have green aventurine and (I think) rainbow obsidian spheres, and a large clear quartz (a wand shape) in my living room. I also have one in blue aventurine with other gemstones added, and some other crystals there.

I have some geode pieces (amethyst and quartz), and some tumbled stones (blue aventurine and others) on window sills upstairs. I have some selenite (a tumbled stone which I tend to leave near/on an owl shaped candle holder and which has a habit of falling behind cabinets - hopefully I got it out the last time) and I know I've got a crystal slice floating about. I've also got a small frog (I think it's tiger's eye, but I might be mis-remembering) on my bedroom window sill. I'm away right now so I can't just go and check.

I have one crystal pendant with me, and it's black tourmaline with a smaller pink tourmaline. I bought a beaded bracelet while I was travelling, and it's green jade.